Rope sling clamp



Patented Dec. 2, 1941 E UNITED stares PATENT orties norav sLING. CLAMPlFrank A. Borsa, New Grleans, La. Application December 19, 1940,. SerialNo. $741,870y

(Cl. 2li-132)' 'T Claims.

This invention relates to rope clamps: and more particularly to a clampvespecially designed for use on rope slings for loading and unloadinglogs and the' like.

The object of the invention is. to provide a rope sling clam-p of simpleand inexpensive construction capable of being readily positioned on thesling and by means; of which several logs may be securely held togetherwhen raising or lowering the same.

A further obiect isto provide a rope sling clamp comprising a tubularmember or easing slidably mounted on the rope sling and provided with apivoted pawl adapted to grip the rope and hold the casing in a selectedposition of adjustment thereon.

A still. further obj-ect of the invention is generally to improve thisrvclass of devices so as to increase their utility, durability andeiciency as well as tofreduce they cost of manufacture.

In the accompanying drawing forming a part of this speciiication and inwhich similar numerals of reference indicate corresponding parts in allthe figures of the drawing:

Figure 1 is an end view of the vrope clamp showing itin position on arope sling and clamping several logs together for the purpose of raisingor lowering Vthe same,

Figure 2 is a side elevation,

Figure 3 is an end view of the clamp detached,

Figure 4 is a front view,

Figure 5 is a vertical sectional view showing the spring actuated pawlin normal position,

Figure 6 is a similar view showing the clamping action between thepivoted pawl and rope,

Figure 7 is a transverse sectional view taken on the line 1 1 of Figure3,

Figure 8 is a similar view taken on the line 8 8 of Figure 3, and

Figure 9 is a vertical sectional View showing the pivoted pawl moved toinoperative position to permit passage of the rope therethrough.

The improved device forming the subject-matter of the present inventionis principally designed for clamping a plurality of logs in assembledposition when raising and lowering the same, and in Figure l of thedrawing there is illustrated several logs 5 held in hunched relation toeach other by means of a looped rope or sling 6.

The device comprises a tubular member or casing 'l having upper andlower anges 8 and 9 connected by spaced vertically disposed reinforcingribs l0. The bore of the tubular member I is preferably substantiallyelliptical in shape in. cross section,y as indicated at vI l., toaccommodate adjacentv strands-of the rope 6v yand permit said tubularmember to be adjusted vertically of the sling to facilitate clamping thelogs in assembled position.

Extending laterally from one side of the tubular member or casing 'l :isa. hollow boss i2, the inner Walls I3 of which are inclined in thedirection of the bore of the casing and disposed parallel to eachother,as best shown in Figure 6 of the drawing. Extending transversely of theboss l2 is a rod or pin .t4 having its opposite ends journaled insuitable bearings l5 formed inthe boss l2., and. secured to said pin isa spring pressed pawl. |`6,th'e beveled end I-'I of which normallyprojects within the bore of the tubular member or casing I..

The lhody portion of the casing and the pawl [6 are provided withdepressions or sockets i8 and I8', and. flttedin said sockets are theadjacent ends of a. coiled spring i9 which serves to normally andyieldably hold the upper surface of the pawl. in contact with a atsurface or abutment `Ill on the hollow boss and prevents downwardturning movement of the inner end ofthe pawl. The outer or free end ofthe pawl is cut away to form a finger-piece 2 |,by depressing which thepointed. end of said pawl may be swung laterally to a position inalinement with the bore of the casing so as to permit the casing toslide freely on the rope or sling when desired.

In operation, the rope or sling 6 is looped around the logs 5 and thetwo strands of the rope passed through the casing 1 and tted over thehook 22` of a suitable clevis or other elevating device. Thefinger-piece 2| of the pawl is then depressed so as to clear the ropeand the clamp moved downwardly on the sling or loop to tighten said looparound the logs. Pressure on the finger-piece 2| of the pawl is thenremoved, thereby causing the spring to force the beveled end I1 of thepawl against the rope so that any pressure of the bight of the loopagainst the bottom ange of the casing will securely clamp said casing inposition. To remove the clamp, it is merely necessary to again depressthe finger-piece 2l so as to release the pawl when the companion strandsof rope constituting the sling may be readily withdrawn from the casing.By reference to Figure 7 of the drawing, it will be noted that the pawlI6 is of sufficient Width to simultaneously grip both strands of thesling 6 so as to securely hold the clamp in adjusted position.

While the device is especially adapted for handling logs, it will, ofcourse, be understood that said device may be used with equally goodresults for loading or unloading boxes, crates, sacks and the like.

It will also be understood that the devices may may be made in diierentsizes and shapes and constructed of any suitable material withoutdeparting from the spirit of the invention. Y

Having thus described the invention, what is claimed as new is:

1. A clamp for rope slings provided with a hollow boss having inclinedwalls and an abutment intersecting one of said walls, a gripping pawlpivotally mounted within the boss, anda spring interposed between one ofsaid inclined walls and the pawl for normally holding said pawl againstsaid abutment, the pawl being movable into gripping engagement with arope for locking the clamp in a set position of adjustment thereon.

2. A clamp for rope slings comprising a casing having a substantiallyelliptical shaped bore adapted to receive companion strands of a ropesling, a hollow boss extending laterally from the casing and providedwith oppositely disposed inclined walls, a spring actuated gripping pawlpivotally mounted within the boss for engagement with said companionstrands of rope, and an abutment formed on the hollow boss andinersecting the adjacent inclined wall for limiting the pivotal movementof the pawl.

3. A clamp for rope slings comprising a casing having a substantiallyelliptical shaped bore adapted to receive companion strands of a ropesling, a hollow boss communicating with said bore and provided withupper and lower inclined walls, bearings formed in said boss, a pinjournaled in the bearings, a gripping pawl movable with the pin andadapted to engage and hold the casing in adjusted position on the ropesling, and a spring interposed between the casing and said pawl.

4. A clamp for rope slings comprising a c asing having a central boreand provided with upper and lower flanges connected by verticalreinforcing ribs, a hollow boss integral with the casing andcommunicating with the bore thereof, the inner walls of said boss beinginclined and one of said walls provided with a at portion forming anabutment, a gripping pawl pivotally mounted within the boss, and aspring interposed between the pawl and casing for holding said pawl incontact with the abutment.

5. A clamp for rope slings comprising a casing having a centralsubstantially elliptical shaped bore to accommodate two strands oi arope, a hollow boss extending laterally from one side of the casing andcommunicating with said bore, the interior walls of said boss beingdisposed parallel with each other and inclined in the direction of thebore, a gripping pawl pivotally mounted within the boss and providedwith a terminal portion of suicient width to engage both strands of therope, and a spring interposed between the casing and the outer portionof the gripping pawl.

6.1A clamp for rope slings comprising a casing having a hollowsubstantially elliptical shaped bore, a hollow boss extending laterallyfrom one side of the casing and communicating with the interior of thebore, the inner walls of said boss being inclined in the direction ofthe bore and one of said wallsformed with a straight portionconstituting an abutment and the other with a seating socket, a pawlpivotally mounted within the boss and provided with a seating socket,and a coiled spring having one end thereof seated in the socket in theinclined wall and the other seated in the socket of said pawl.

7. A clamp for rope slings comprising a casing having a hollow bore andformed with upper and lower laterally extending iianges, reinforcing arope and its outer end reduced to form a lingerpiece, and a springinterposed between the casing and said pawl for normally holding thepawl in engagement with the abutment.

FRANK A. DORSA.

